Revolving firearm.



N0. 689,250. f' Palfe'nfe'd DUC. T7, |90I.

. D. B. WESSON.

BEVULVING FIBEARM.

(Application led May 18, 1901.)

(No Model.)

Nie

N DANIEL B. WESSON, OF SPRINGFIELD, MASSACHUSETTS.

REVOLVlNGFlREARh/l.-

lSi?LEGliFICLAION' forming part of Letters Patent No. 689,260, dated I icernber 17, 1901.

`Application filed May 18, 1901.

To all whom lit may concern:

Beit known that LDANIEL BWEssoN, acitizen of the United States of America, residing at Springfield, inthe county of Hampden and 4State of Massachusetts, have invented new and useful Improvements in Revolving Firement in means for securing the cylinder' of revolvers of this type in their frames in such manner that the axis of the chambers of the cylinders when in ring positionwill register accurately with the axis of the barrel..

The invention consists in the construction described in the following speciiication and clearly defined in the claims forming part thereof.

In the drawings forming part of this specicat-ion, Figure 1 is a side elevation, partly in section, of a revolver embodying my invention. the barrel of the firearm, showing the position of the forward end of the extractor-stem relative thereto when the cylinder is locked in the frame.

The essence of this invention lies in the pro- Vision of means for locking the cylinder at opposite ends thereof in the frame of tho arm in the manner to be described farther on.

Referring now to the drawings, @indicates the frame of the firearm, l) the barrel, c the cylindcr, and d the yoke on which the cylinder is supported, which yoke is pivoted in the frame at e, all as is customary in revolvers of this type.

ini carrying my invention into practice I provide a center-pin /whichvis axially located in the extractor-stem g, and is of substantially the same length as the latter. A'spring hon the center-pin has a bearing on a-shoulder in the extractor-stein at one end and.

against the collar on the center-pin at the other, whereby the end of said pin when the cylinder is in proper position is forced into a hole z' in the frame. At the forward end of the extractor-stem a lug j is formed on the barrel, and this is bored out in axial aline-l ment with the center-pin f for the reception lofa bolt k, which by a spring Z is forced to- Fig. 2 is, a side elevation of a part of' serial in. 60.850. (Nt man.

ward the end of the center-pin in 'the extractor-stem g. When'the cylinder is in such position-that the cylinder-pin f will enter the hole i to lock the rear end of the cylinder, the bolt 7o will at the same moment follow the retreating end of the pinj'into the-hole in the 4 end of the extractor-stemg, in which said center-pin is locate d,th us providingjalso a positive lock for the forward-end of the cyll inder. The forward end of the extractorstein g is provided with a head m, having a spherical-shaped end thereon, the'purpose of which is to crowd the bolt back into its recess in the lugj when the cylinder is swung into the frame, it being obvious that the bolt k will shoot outwardly as soon as the end of the extractor-stern is withdrawn from in front of the lugj. This retraction of the bolt lo is eected by the contact of the spherical end Vot' the head m with the similarly-shaped end of the bolt k, and when the cylinder reaches its proper position in the frame the centerpin f and the bolt it perform their respective locking functions, as described, the one enteringr the recess t' and the other. the end of the extractor-stem.

Any suitable means may be employed for forcing the center-pinendwise out of the hole o, which operationialso forces the bolt lo back into the lngj, permitting the cylinder and extractor-pin to be swung outward.

lIn the drawings the means shown formoving the ccnter-pi'ifendwise consists of a slide n, (shown in vdotted lines only in Fig. 1,)'having the nose o thereon, which bears against the end of the center-pin. This slide has a longitudinal movement in the frame and is actuated bya thumb-leverp, hung on the side of the frame and engaging the slide n by means of a pin q, passing through a slot in the side of the frame.

The construction of the cylinder and cylinder-pin and means for mounting the cylinder on its pin are all com'nion to revolvers of this type. The extractor-stem, however, is made in two parts, united at 1 byscrewing the parts together. This construction of the extractorstem is solely for the purpose of providing the vchamber therein in which 'the spring h may' be located for moving the center-pin, as described. The'usual spring s on the extractor- IDO stern is provided for retracting the latter when it has been operated to eject the empty car tridgeeases.

By means of theherein-described construction means are provided for positively locking` the cylinder in the frame by locking` each end of the extractor-stem thereto, thus holding the cylinder on an axis vi hich is parallel with the axis oi the barrel, thereby assu ring the perfect aiinement of the chambers of the cylinder with the bore of the barrel.

Ieretofore in revolvers of this type, in which the only means for locki ng the cylinder in the frame has been a short center-pin engaging the recess inthe frame at the `rear of the cylinder, it has been observed that the cylinder would not always swine'np into its proper position in the frame. This was foundv to be due lo the fact that some substance had become lodged between the yoke and the frame, springing the yoke'more or less, and thus throwing the axis othe cylinder-pin out vof parallelism with the axis of the barrel.l

With ille present construction the presence of any substance between the yoke and the frame would render it impossible to swing'the cylinder and extractor-stem up into posi-V tion which would permit the operation of the Adoubledoeking, device shown herein, and thus the presence of any obstruction to the proper lockingof the' cylinder would be detected.

Having th'ns described my invention, what I claim, and desireto secure lby Letters Patent of the United States, is-.

l. In a reyolver, the combination .with a side-swinging cylinder, means for supporting the latter rotatably on its axis, locking de-A yices for engaging oppositeends of said axis' when the cylinder is in firiug position, and means on 'the arm for releasing both ends of said axis simultaneously, substantially as described.

2. in e. revolver, thecombination with a side-swinging cylinder, of .an extractor-stem axially located therein, a centenpnin said eeaeeo stem, means of engagement between one endv 3.1m a revolver, in combination, a sideswinging cylinder,'an extractor-stem extending therethrough, a longitudin'ally-movable pin in the latter for enga-gement With the frame at the rear end of the cylinder, a bolt supported on the-barrel, andfmeans of engagementbetween said bolt and the end of the.

extractor-stein, operable si'i'nultaneonsly with the engagement of: said pinlwith the frame, and means for simultaneously disengaging said bolt and said pin, s ubstantiallyxasdeff" l scribed. A ,m I

4. The combination in a revolver, ofa cy1- inder adapted to swing-sidewise'intoand out i of the frame, an extractor-stem 'extending Lhronglrsaid cylinder, a center-pin in the extractor-stem, movable into and out of a recess in the frame; aspringbolt located under-the barrel ofthe arm inaxial alinenientyith said center-pintor engagement with thef'end of the extractor-stem; a lslide in thefiraine for engaging the end of the center-pin',and means for actuating said slide whereby the said pin is moved endwise in said extractor-stem, and

said spring-boltthereby disengaged from 'said etem, substantially as described.

5. The combination With the extractor-stem of a revolver ofthe class described, of an endwise-movable center-pin in said stem, a bolt kin axial alinement with said pin and adapted to engage said stem, means for moving said bolt and pin positively in the same direction at the same time, anda suitable spring for moving them in the opposite direct-ion, snbstantially as described. A

DANIEL B. WESSON. ViTit-nesses:

WM. H. CHAPIN, K. I. CLEiiioNs. 

